/*
 *  Copyright 2008 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.mybatis.generator.codegen.ibatis2.dao.elements;

import java.util.Set;
import java.util.TreeSet;

import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
import org.mybatis.generator.api.dom.java.Interface;
import org.mybatis.generator.api.dom.java.JavaVisibility;
import org.mybatis.generator.api.dom.java.Method;
import org.mybatis.generator.api.dom.java.Parameter;
import org.mybatis.generator.api.dom.java.TopLevelClass;
import org.mybatis.generator.internal.util.messages.Messages;

/**
 * 
 * @author Jeff Butler
 * 
 */
public class SelectByExampleAndPageMethodGenerator extends
		AbstractDAOElementGenerator {

	private boolean generateForJava5;

	public SelectByExampleAndPageMethodGenerator(boolean generateForJava5) {
		super();
		this.generateForJava5 = generateForJava5;
	}

	@Override
	public void addImplementationElements(TopLevelClass topLevelClass) {
		Set<FullyQualifiedJavaType> importedTypes = new TreeSet<FullyQualifiedJavaType>();
		Method method = getMethodShell(importedTypes);

		if (generateForJava5) {
			method.addSuppressTypeWarningsAnnotation();
		}

		StringBuilder sb = new StringBuilder();
		sb.append(method.getReturnType().getShortName());
		sb.append(" list = "); //$NON-NLS-1$
		sb.append(daoTemplate.getQueryForListWithPageMethod(
				introspectedTable.getIbatis2SqlMapNamespace(),
				introspectedTable.getSelectByExampleAndPageStatementId(),
				"example","example.getStart()","example.getLimit()")); //$NON-NLS-1$
		method.addBodyLine(sb.toString());
		method.addBodyLine("return list;"); //$NON-NLS-1$

		if (context.getPlugins().clientSelectByExampleAndPageMethodGenerated(
				method, topLevelClass, introspectedTable)) {
			topLevelClass.addImportedTypes(importedTypes);
			topLevelClass.addMethod(method);
		}
	}

	@Override
	public void addInterfaceElements(Interface interfaze) {
		if (getExampleMethodVisibility() == JavaVisibility.PUBLIC) {
			Set<FullyQualifiedJavaType> importedTypes = new TreeSet<FullyQualifiedJavaType>();
			Method method = getMethodShell(importedTypes);

			if (context.getPlugins()
					.clientSelectByExampleAndPageMethodGenerated(method,
							interfaze, introspectedTable)) {
				interfaze.addImportedTypes(importedTypes);
				interfaze.addMethod(method);
			}
		}
	}

	private Method getMethodShell(Set<FullyQualifiedJavaType> importedTypes) {
		
		 FullyQualifiedJavaType type = new FullyQualifiedJavaType(
	                introspectedTable.getExampleType());
	        importedTypes.add(type);
	        importedTypes.add(FullyQualifiedJavaType.getNewListInstance());

	        Method method = new Method();
	        method.setVisibility(getExampleMethodVisibility());

	        FullyQualifiedJavaType returnType = FullyQualifiedJavaType
	                .getNewListInstance();
	        ;
	        if (generateForJava5) {
	            FullyQualifiedJavaType fqjt;
	            if (introspectedTable.getRules().generateBaseRecordClass()) {
	                fqjt = new FullyQualifiedJavaType(introspectedTable
	                        .getBaseRecordType());
	            } else if (introspectedTable.getRules().generatePrimaryKeyClass()) {
	                fqjt = new FullyQualifiedJavaType(introspectedTable
	                        .getPrimaryKeyType());
	            } else {
	                throw new RuntimeException(Messages
	                        .getString("RuntimeError.12")); //$NON-NLS-1$
	            }

	            importedTypes.add(fqjt);
	            returnType.addTypeArgument(fqjt);
	        }

	        method.setReturnType(returnType);

	        method.setName(getDAOMethodNameCalculator()
	                .getSelectByExampleAndPageMethodName(introspectedTable));
	        //parm
	        method.addParameter(new Parameter(type, "example")); //$NON-NLS-1$

	        for (FullyQualifiedJavaType fqjt : daoTemplate.getCheckedExceptions()) {
	            method.addException(fqjt);
	            importedTypes.add(fqjt);
	        }

	        context.getCommentGenerator().addGeneralMethodComment(method,
	                introspectedTable);

	        return method;
	}
}
